One-pot epoxide-driven synthesis of M2Al(OH)6Cl·1.5H2O layered double hydroxides: Precipitation mechanism and relative stabilities

A family of single-crystalline particles of M2Al(OH)6Cl·1.5H2O layered double hydroxides (LDH) with M(II) a transition-metal cation were obtained by a one-pot room-temperature homogeneous alkalinization driven by glycidol ring opening. In contrast with traditional homogeneous methods, LDH phases are...

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Autores principales: Oestreicher, V., Fábregas, I., Jobbágy, M.
Formato: JOUR
Materias:
Chlorine compounds
Field emission microscopes
Free energy
Scanning electron microscopy
Solubility
Transition metals
X ray diffraction
Continuous measurements
Field emission scanning electron microscopy
Heterogeneous nucleation
Homogeneous alkalinization
Layered double hydroxides
Powder X ray diffraction
Precipitation mechanism
Thermochemical models
Aluminum
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_19327447_v118_n51_p30274_Oestreicher
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_19327447_v118_n51_p30274_Oestreicher2023-10-03T16:35:59Z One-pot epoxide-driven synthesis of M2Al(OH)6Cl·1.5H2O layered double hydroxides: Precipitation mechanism and relative stabilities Oestreicher, V. Fábregas, I. Jobbágy, M. Chlorine compounds Field emission microscopes Free energy Scanning electron microscopy Solubility Transition metals X ray diffraction Continuous measurements Field emission scanning electron microscopy Heterogeneous nucleation Homogeneous alkalinization Layered double hydroxides Powder X ray diffraction Precipitation mechanism Thermochemical models Aluminum A family of single-crystalline particles of M2Al(OH)6Cl·1.5H2O layered double hydroxides (LDH) with M(II) a transition-metal cation were obtained by a one-pot room-temperature homogeneous alkalinization driven by glycidol ring opening. In contrast with traditional homogeneous methods, LDH phases are obtained in the exchangeable chloride-containing form. The main precipitation steps were assessed by continuous measurement of pH profiles, field emission scanning electron microscopy, and powder X-ray diffraction, revealing the heterogeneous nucleation of LDH phase over previously formed nano-Al(OH)3 seeds. The precipitation pH plateau of each LDH follows the trend of the inherent solubility of the single M(II) phases obtained under alkalinization. A linear free-energy relation links the solubility of the bare M(II) hydroxides with the correspondent M(II)-Al(III) LDH, in good agreement with previously reported thermochemical models. © 2014 American Chemical Society. Fil:Oestreicher, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Fábregas, I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_19327447_v118_n51_p30274_Oestreicher
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Chlorine compounds
Field emission microscopes
Free energy
Scanning electron microscopy
Solubility
Transition metals
X ray diffraction
Continuous measurements
Field emission scanning electron microscopy
Heterogeneous nucleation
Homogeneous alkalinization
Layered double hydroxides
Powder X ray diffraction
Precipitation mechanism
Thermochemical models
Aluminum
spellingShingle Chlorine compounds
Field emission microscopes
Free energy
Scanning electron microscopy
Solubility
Transition metals
X ray diffraction
Continuous measurements
Field emission scanning electron microscopy
Heterogeneous nucleation
Homogeneous alkalinization
Layered double hydroxides
Powder X ray diffraction
Precipitation mechanism
Thermochemical models
Aluminum
Oestreicher, V.
Fábregas, I.
Jobbágy, M.
One-pot epoxide-driven synthesis of M2Al(OH)6Cl·1.5H2O layered double hydroxides: Precipitation mechanism and relative stabilities
topic_facet Chlorine compounds
Field emission microscopes
Free energy
Scanning electron microscopy
Solubility
Transition metals
X ray diffraction
Continuous measurements
Field emission scanning electron microscopy
Heterogeneous nucleation
Homogeneous alkalinization
Layered double hydroxides
Powder X ray diffraction
Precipitation mechanism
Thermochemical models
Aluminum
description A family of single-crystalline particles of M2Al(OH)6Cl·1.5H2O layered double hydroxides (LDH) with M(II) a transition-metal cation were obtained by a one-pot room-temperature homogeneous alkalinization driven by glycidol ring opening. In contrast with traditional homogeneous methods, LDH phases are obtained in the exchangeable chloride-containing form. The main precipitation steps were assessed by continuous measurement of pH profiles, field emission scanning electron microscopy, and powder X-ray diffraction, revealing the heterogeneous nucleation of LDH phase over previously formed nano-Al(OH)3 seeds. The precipitation pH plateau of each LDH follows the trend of the inherent solubility of the single M(II) phases obtained under alkalinization. A linear free-energy relation links the solubility of the bare M(II) hydroxides with the correspondent M(II)-Al(III) LDH, in good agreement with previously reported thermochemical models. © 2014 American Chemical Society.
format JOUR
author Oestreicher, V.
Fábregas, I.
Jobbágy, M.
author_facet Oestreicher, V.
Fábregas, I.
Jobbágy, M.
author_sort Oestreicher, V.
title One-pot epoxide-driven synthesis of M2Al(OH)6Cl·1.5H2O layered double hydroxides: Precipitation mechanism and relative stabilities
title_short One-pot epoxide-driven synthesis of M2Al(OH)6Cl·1.5H2O layered double hydroxides: Precipitation mechanism and relative stabilities
title_full One-pot epoxide-driven synthesis of M2Al(OH)6Cl·1.5H2O layered double hydroxides: Precipitation mechanism and relative stabilities
title_fullStr One-pot epoxide-driven synthesis of M2Al(OH)6Cl·1.5H2O layered double hydroxides: Precipitation mechanism and relative stabilities
title_full_unstemmed One-pot epoxide-driven synthesis of M2Al(OH)6Cl·1.5H2O layered double hydroxides: Precipitation mechanism and relative stabilities
title_sort one-pot epoxide-driven synthesis of m2al(oh)6cl·1.5h2o layered double hydroxides: precipitation mechanism and relative stabilities
url http://hdl.handle.net/20.500.12110/paper_19327447_v118_n51_p30274_Oestreicher
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AT fabregasi onepotepoxidedrivensynthesisofm2aloh6cl15h2olayereddoublehydroxidesprecipitationmechanismandrelativestabilities
AT jobbagym onepotepoxidedrivensynthesisofm2aloh6cl15h2olayereddoublehydroxidesprecipitationmechanismandrelativestabilities
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